Mechanism for knotting together threads



Oct. 6, 1931.

F. KLEIN ET AL MECHANISM FOR KNOTTINGTOGETHER THREADS Filed April 25, 1930 4 Sheets-Sheet l I INVENTORJ. 1071 [is in, '14 d Walszgan ATTORNEY Oct. 6, 1931. F. KLEIN ET AL 1,825,872

' MECHANISM FOR KNOTTING TOGETHER THREADS Filed April 23, 1930 4 Sheets-Sheet 2 W5 TORS,

7 BY 3 ATTORNEY.

Oct. 6, 1931. F KLEIN ET L 1,825,872

MECHANISM FOR KNOTTING TOGETHER THREADS Filed April 23, 1930 4 Sheets-sheet 3 VEN R Fred ar z'ck /p Ze 61 13;;

wm- 21 a ATTORNEY Oct. 6, 1931. i F. KLEIN ET AL 1,825,872

MECHANISM FOR KNOTTING TOGETHER THREADS Filed'April 25, 1950 4 Sheets-Sheet 4 ATTORNEY gripping strand a;

' v holder Patented Oct. 6, 1931 UNITED smss A NT] QFFICE FREDERICK KLEIN", or COLLEGE POINT, AND FEEDQWALsLE EN, or ocEAnsInE, NEW YORK, ASSIGNOBS To WARP: TWISTING-IN MACHINE COMPANY, or. BROOKLYN, NEW Storm, A CORPORATION on NEW Yon-x I MECHANISM FOR imorrnve TOGETHER. THREADS Application a April 23,

This invention consists in certain improvements upon the method of and'apparatusfor tying weavers knots (as in piecinga-new warp onto a warp about to become exhaustedin a loom) which is set forth in the-Klein Patent No. 1,776,912. The principal object is to improve the method and apparatus therein set forth to'the end that failure to form a knot or a possibility of collapse after discharge from the knot-forming procedure shall be avoided. I

V The invention will be set forthin reference to the accompanying drawings by which it 18 fully illustrated and wherein- Fig. 1 is a front elevation of the apparatus; F igf2 is a front elevation of the first loopformer, the knot tyer, the second loop-"former and certain parts concerned with our improvements, all in their retracted positions Fig. 3 is a somewhat similar view but show- ;ing the several partsmore or less advanced in the operation of tying the knot;

' Fig. 4 shows how the loops are formed in the two strands; a Y

Fig. 5 shows in front elevation, partly 1n section, the seoond loop-former and a part of our improvements and mechanism foreffecting their movement;

Fig. 6 is a fragmentary plan of what is shown in Fig. 5; V g

Fig. 7 shows in s de elevation the means for "how thenoose a is formed Fig. 8 shows strand b and the noose around loop b of Fig. 9 isa right handelevation, partlyin section, of the means for forming loo-p Z) in application, to wit:'.

trolling strandt-fand the and severing and gripping and otherwise conop holding means i right of part 18a in Fig. 10; and vvi Fig. '12 is a sectional viewof thebill Ora-1e knot tyer.

The following mechanism is or be substantially the same as in the mentioned Klein The ends of the strands forming the two is pivoted 'as shown and which coacts with v1930. Serial Nb. 446,610.

warps are held'in clampl and are assumed to extend upwardly thereto from between the members 23 of a fork (itselfnot here shown or material) which "projects toward the observer in Fig. 1 and to which they extend [from their respective beams 4-5, being held tensioned by the clamp and beams. Prior to operations herematerial the two strands to be knotted together (the nearest two or the two appearing in the drawings) have been shifted forward toward the free ends of the fork and one transferred so that both engage'member 2 (Fig. 2') and they cross each other with strand a forward of strand band its hook draws strand 6 to the left forward of strand a, forming loop 6 around and a bitch with strand (1. The knot tyer, generally designated by 9 and pivoted at 10 and actuated by groove 11a of a rotating cam 11 I and connected at 9a vwith the first loop-former.

"to actuatethe same as 'described, now descends between loop Z2 and the upreaching part of stranda (*Figi3) whereupon, the strands being'now held bythe bill of the knot=tyer at thek-notting point, fork member 2 withdraws; the: bill of the knot-tyer' is formed by two'fixed members 9?) andan intervening member'9c (Figsft and 12) which one of these'members first to grip and with the other ,then'tosever thestrand ruin a way in itself known in the art (see Fig.12, where the member '90and one of the members 9?) ';have rounded gripping edges and member and the other member 9?) have sharp severing edges), itsmotion being obtained from a groovellb (Fig.2) in the cam. The second ,loo'p former 12, universally pivoted at 12a, now moves toward. the observer against strand. a, then down pastthe hitch in the strands and then-rearward, catching strand a on a shoulder 9d of the knot-tyer and forming a loop a therein (Fig. 4), whereupon it leaves one stretch of this loop in the bill of the knot-tyer,fwhich nowcloses to grip and 1 which consist-sin arranging two s -,tr-ands[so :that aloop is formed in one aroundthe other bill coming to a pause the grippingmeans 23*24 releases. strand 0; and the mentioned residual tension therein now comesinto play to draw up the noose of it around loop 6 and the noose-holder 29, (the portion of strand a which reaches through the loop slipping th erethrough to the right in Fig. 8), after which the bill continues its upward movement to draw up the knot tight and the loopholder withdraws. \Vhat we 'aiin at by this is to avoid the bill causing thenoose {t to slip off the free'end of loop 6', which would mean- 'liai'lure to-tie the knot; a perfect knot by the present invention results partly because the noose-holder definitely fixes the tying pom-t and thus contributes to prevent the noose slipping off the loop 6 and partly because the residual tension in thread a draws up the noose so as to sufliciently snugly embrace the loop to prevent its slipping oil its free end when the increment of the knot-tyer to draw the noose tight occurs. The elasticity referred to is" such as is present in almost any lidorous strand; it will usually be present in both strands but of course it it is present in only strand a the invention would .be accomplished. i a 7' a 1 When the fork 2-8 recedes and leaves the strand hitch held by the bill of the knot-tyer there occurs an undesired relaxation of the tension on the strands which tends to place them out of control and which we avoid by interposing in the path of thcloop b as it is vformed by loop-former 7 a take-up device in the form of a lever 30 ur ed normally toward takes up any slack tending to form and maintains the desired tension.

a I what wecl'a-nn is: c I 1. The method of tying a weaver-ls knot Havin thus fully described our invention and a noose is formed in said other strand around saidloop and in embracing relation to anoose-holder and drawing the'noose into constricting relation to both said loop and the noose-holder at once.

2, The ne'thod of tying a weavers knot which consists in first forming a loop in one strand around another,then forming a noose remaining portion extends from the loop and in the other strand around the loop and in position to embrace a noose-holder, and con-. ti-acting the noose while it still embraces the loop-andnoose-holder.

The methodlor tying a weavers knot which consists in forming a loop in one strand around'another, passing the portion of the other strand which eiztends in one direction from the loop around one side of the loop and between itself and the other side of the loop to form a noose positioned to embrace a Il'O'OSG-l'lOlClQl, and then causing said" other strandtoslip tlirougl'i the loop in the direction in which its remaining portion. extends from the loop andthereby contracting the noose about the noose-holder and loop.

Themethod' of tying a weav'o-rs knot which consists in forming a loop in one strand around another, passing the portion of the other strand which extends in one direction from-the loop around oneside of the loop and between itself and the other side of the loop to form a noose positioned to embrace a nooseiolder, and then drawing the noose into constri'oting relation to both saidloop and noose holder at once.-

5. The m-ethod'of tying a weavers knot which consists in forming a loop in one strand around another, passing the portion of the other strand which extends in one direction from the loop around one side of the loop and between itselfand the other side of the loop and then causin said other strand to slip through the loop in'the direction in which its thereby contracting the noose about the loop. 6. The method of tying aweavefis knot which consists in forming a loop in one strand around another, passing the portion of the other strand which extends in one direction froin the loop around one side of the loop and between itself. and the other side of the loop, then causing saidother strandto slip through the loop in the direction in which its remaining portion extends from the loop and thereby contracting the noose about the loop and'then drawing upon the first portion in the directionin 'which it extends from the loop. c v

7 The method of tying a weavefis knot in two strands one of which is elastic which conl l O sists in holding the elastic strand at two spaced points, forming .a loop in the other strand around the elastic strand between said points and, while causing the thus-engaged strands to tension each othe gpassing a portion-of the elastic strand between one or said points and the loop in a loop across one side oithe first loop and therebyelongatlng and storing up elastic force in the elastic strand, gripping the elastic strand between the first loop and the other-of said points andthereby isolating the elastic force stored up in the elastic strand between said other point and the point of gripping from the remainder of Hill) both strands and meanwhile passing said portion of .the elastic strand between itself and the other side of the first loop and thereby forming a noose in the elastic strand around such first loop, and then relaxing the grip on the first strand and thereby permitting the elastic force to contract the noose.

8. The method of tying a weavcrs knot in two strands one of which is elastic which consists in holding the elastic strand at two spaced points, forming a loop in the other strand around the elastic strand between said points and, while causing the thus-engaged strands to tension each other, passing a portion of the elastic strand between one of I said points and the loop in a loop across one side of the first loop and thereby elongating and storing up elastic force in the elastic strand, gripping the elastic strand between the first loop and the other'of said points and thereby isolating the elastic force stored up in the elastic strand between said other point and the point of gripping from the remainder of both strands and meanwhile passing said portion of the elastic strand between itself and the other side of the first loop and thereby forming a nooscin the clastic strand around such first loop, then relaxing the grip on the first strand and thereby permitting the elastic force to contract the noose, and finally pulling upon said portion of the elastic strand to cause the noose to oonstrict the loop.

9. A weavers knot-forming mechanism comprising, in combination, means to form in one of the two strands to be knotted together a loop around the other, means to form a noose in the second strand around said loop, a noose-holder positioned to be embraced by the noose in the forming thereof, and means after the noose is formed to separate one from the other the noose and noose-holder.

10. A weavers knot-forming mechanism including means to hold two strandswith one looped around the other and the latter extending around the loop and between itself and the loop in a noose and thereupon draw up said noose, a noose-holder movable into and out of position to be embraced by said noose when formed, and means to move the noose-holder into and out of said position.

11. A weavers knot-forming mechanism comprising, in combination, means to form in one of the two strands to be knotted together a loop around the other, means to strand being elastic, spaced means to maintain the elastic strand stretched, means to pass the portion of said elastic strand be tween the loop and one of said spaced means elastic strand to thereby form a noose in the latter around the loop during the temporary holding of the second-named portion, whereby when said holding ceases the elastic force stored up in the elastic strand will cause the latter to slip through the loop and constrict the noose.

13. A weavers knot-forming mechanism comprising, in combination, means to form in one oi the two strands'to be knotted together a loop around the other, the latter strand being elastic, spacedmeans to maintain the elastic strand stretched, means to pass the portion of said elastic strand between the loop and one of said spaced means across'the loop and thereby store up elastic force in the elastic strand, means temporarily to hold the portion of the elastic strand between the loop and the other spaced means against relaxing, means to pass the first portion between the loop and said elastic strand to thereby form a noose in the latter around the loop during the temporary holding of the second-named portion, whereby when said holding ceases the elastic force stored up in the elastic strand will cause the latter to slip through the loop and eonstrict the noose and means, after said holding ceases, to draw upon said first portion to further constrict the noose.

14. In combination, a pair of strand-gripping blades movable one in wiping. contact with the other, said blades having gripping portions coactive to grip a strand intersecting their planes when the movable blade is moved in one direction and one of said blades being resilient, and meansenpon the blades gripping a strand, to flex the resilient blade from the other out of its normal plane.

15. Strand-holding means comprising a pair of gripping blades one of which is mov able in wipingcontact with the other and thereby into strand-gripping relation to the other, one blade being elastic, and mechanism to cause snch'movement of the movable blade and thereupon bend the elastic blade from the other blade to relax the grip ofthe blades on the strand.

In testimony whereof we afiix our signatures.

FREDERICK KLEIN. FRED WALSLEBEN.

gether a loop around the other, the latter 

